Garmin GPS 400 Pilot's Manual And Reference page 91

The following descriptions and abbreviations are used on the airport frequency
page:
• Type— Usage type: Public, Military or Private
• Frequency— Communication frequencies which may include restrictions:
Approach
Class C
TMA
Communication frequencies without restrictions:
ATIS
Center
Control
Multicom
Ramp
Navigation frequencies:
ILS
Arrival Class B
CTA Departure
Terminal TRSA
ASOS AWOS
Clearance Gate
Ground Helicopter
Pre-taxi Radar
Other Tower
Unicom
LOC
WPT PAGES
Airport Frequencies
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